Machine for applying tire patches



July 21, 1936.

(3.. E. DUNLAP MACHINE FOR APPLYING TIRE PATCHES Filed Dec. 31. 1934 Patented July 21, 1936 r v UNITED STATES PATENT OFFICE 2,048,542 I j MACHINE FOR APPLYING TIRE PATCHES Clarence E. Dunlap, Sioux City, Iowa 7 7 Application December 31, 1934, Serial No. 759,894 9 Claims. (01. 18-18) My invention relates to an improved apparatus with a very great pressure to insure a firm bondfor applying either hot or cold patches to a tube. ing with the tube.

An object of my invention is to provide a device The principal object contemplated in the presof such character which can be readily accoment invention is'to provide means for easily and modated for use with either cold or hot patches. readily changingthe device for use with hot or 5 A further object of my invention is to provide a cold patchesas desired without the necessity of device of this character which will allow'changing removing or changing parts associated with the of the machine to apply either type of patch as dedevice. sired, I have used the character It] to indicate the A further object of my invention is to provide frame of this machine itself, which preferably is 10 adjustable means so that either a. minimum or a made of a suitable grade of high strength cast maximum pressure can be applied, at the same iron or the like. The frame l0 includes the portime rendering the apparatus fool proof so that tion H which receives the plunger i2 which slides undue pressures will not be set up when such are Within the opening I3; not desired. The plunger I2 includes the plunger head [4 15. A further object of my invention is to provide beneath which is positioned the spring IS. The a structure associated with the device so that heat p un head includes the und d p t on 1 6 can be readily applied to the patch, which heat whlch is adapted to co-act With'the cam portion is concentrated in ahighly eifective manner. n which pivots a p n and extends into the A further object of my invention is to provide integral ve L 20 means for centering a patch on the tub d t In one form of the device, the lever 9 receives I further provide means for applying different Size the further telescoping element 20 which includes patches, the head 2|. Figure 1 shows the elements tele- A further obje t of my invention is to provide a scoped together and also with the member 20 5 structure of extreme simplicity which will at- Pulled out tain the result above mentioned, and which can The plunger 1S forced d wnw rdly by virtue be manufactured at a reasonable Cost. ofthe cam member 11 pressing against the por- With these and other objects in View my tion I 6, and it will be noted that an extremely vention consists in the construction, arrangement flarge leYerage is Obtained by Virtue 0f the dif- 3 and combination of the various parts of my ference in length between the lever l9 and the vice whereby the objects contemplated a relatively short member I1. It will be noted that tained, as hereinafter more fully set forth, point- 'whgn the are telescoped together that a ed out in my claims, and illustrated in the accomsmaller pressure W111 be set up through the plungpanying drawing, in which:

Figure 1 is a side elevation of one form of the device,

Figure 2 is a plan view of the device,

the telescoping member 20 is pulled outwardly of the members Hand 20 is much longer. 7 l a Formed together with the plunger I 2 is the gg i f; g g a Sectlonal detafl i reduced diameter extension 22 into which is 40 threadedly engaged at 23 the hardened member 40 Figure 4 is a preferred modified form of the devicein sectional detail, 8512035211011 has the lower rounded surface 54 as .Figure is Outside View of the modification The column 22 receives the four-armed spider dlsqlosed glgur a h frame 55 which is rounded at 56 and which bears fz s 0W5 9 W106 w en used a against'the shoulder- 51 of the post I2. 45

In applying a hot patch to a tube, in other are not applied against the pat h, Since h made-largerthan the post 22 to allow free iv- 50 treme pressures would tend to distort the patch ting v nt of th spider against th g p out of shape and unduly affect the material of the der25'l. r l 3 .patch. 1 The pins 58 are afiixed at 60 to the sides 34 of On the other hand, a cold patch, or that type of the pan, and these pins pass through suitable patch which does not require heat, must be applied openings in the ends of two opposite arms 6| 'of the spider frame (see'Figure 2). The other two arms 62. are left free as shown in Fi l 'fl 1. V V V A centering device can be used in combination with" the clamp if desired, although the patch can be affixed withoutthe centering device .if necessary. .This' centering device includes the '7 member 25 which has the beveled shoulders 26,

eter of the patch.

which shoulders are adapted to co-act with the beveled shoulders 21 oi'the patch 28. The reason for-this is faces will co-act to firmly sealthe'beveled perimportion 25; and which is springurged-pymeans V portion.25.: The centering of the spring 30. The sm'all flange 3|. which is an integral part ofthe portion '25,*serves to' re he ring 29; and: the

device is a complete tain the spring between unitin itself, and can be used as such.

The pan 24;can be built in an approximately rectangular shapeas' shown bythejcharacter 'fie m Figure 2 in V is attached by means era fshlort chainfii to the frame order. to accommodate a longer and narrowe'rpatch when 1 desired.

A steel'disct l having a :cupshape cavity 65 of. the device. ..The-base of the de vice is representedby the characterl 31. V

' the. tube; the telescoping When it is desiredto attach a cold patchto member is pulled outwardly, thereby creating-a long lever arm,

and the patch is inserted in the sleeve 29, and the lever is'pulledin r Bef ore exer :the normal direction as indicated by the arrow 38. I 1

ting the extremely large pressure necessary for affixing the, cold: patch, however, the disc 64 must be inserted in the .pan'24 so that .the pressure can be transmitteddirectly to -the throughthe member .53. -'.Befo re inserted. the plunger osition-and the arms be directly under the heads of the pins-58.; The

patchthrough the 'solid posts [2 and -22'and i the disc is l4 -will beinthe rais d P0 61 of the spider .irame will heads-of these pins are highenough above'the j pan rim to allow insertion of'the disc 64 through the space 61.;This-is'illustratedmore clearly in Figure 1, and by the dotted lines in Figureffi.

' r 1 r When the maximum .pressureis'now brought '50 7 (strain so thatj the same :canv be transmitted downwardly thedisc'64 will. absorb all of the directly through solid metal surfaces to the patch without having the tendency of breaking any of 1 the parts. '55

rounded surface .54 of the member'53 with the 'rounded'cavity 65 permits of a pivoting'arrangeg ment on the disc 5. which; pivotisgata low the. Fmaximum 'onall points of point, thus attaining V securing a positive pressure the area of: thepatchgeven in spite otvariations *;in the thickness of the tube underithe patch.

@The pressure will betransmitted ;efli'ciently "against the 'entire area of thepatch without placing any undue strain upon a ny. other parts of the machine.-

Z'When a hot patch is desiredgthe disc! is notusedjand the device iunctions as shown in f Figures 3 and 451-111 this case, V burned: in the pan;

type of patch that the four gasoline can be or else a solid disc of fuel Itwill be noted that in using this arms of 'the'spider suchas: 5

. bear against. theshoulder 51- and the rim of jthe'lipan "24. This provides ';means for-fattainingflan. efilcient pressure onthe-outer cireu-n-rference or perimeter of the patch; and provides the desired angle that under pressure .he beveled V V The patch is received within the sleeve29 whichis slidably engaged with the .In thi's'case; when'thelicentering device'lis used, it 'ca'n'be also. made in anelongated shape. 1

hav the jeirtremities thereof. It will be'. noted from Furthermore, the engagement of the forty'to sixty pounds or thereabo'ut.

fii'll'ed with the' fuel -28 is inserted within a suitable swivelling effect'on the spider frame against the shoulder 51 so that in'this 'case'also the pressure will be transmittedeificiently at against permitting fuel to be inserted in the pan. 7 in r If a solid fuel is used,-it can also be placed in' the opening 61 similarly to the process used in placing the steel disc 64 therein.

It will be. noted from Figure 6 that when the cold patch is applied and the .disc 64 is used that 1o 7 the spider55 is free, and does not function in the apparatus except to center the same. since the length of the post 22 is made long enough 53 bears against thedisc 64 there will be no pressureexerted against the i5 arms 61 and 62; 7

so that as the member This entire arrangementpermits the use 0f "the entire device as a complete unit without the necessity of using any separate parts, and also provides the necessary functions of efficient pressures transmitted at the proper angles with pivoting points being arranged at the lowest possibl'e points. I preferred formof my invention is illustrated in Figures 4' and 5. In this. form, the lever 39 (see Figure 2) is'made of a s'uitablebar 'oi5a constant length which doe's'not require the extra machiningforthe telescoping lever." The plunger 40 includes thefplunger head'fl arcuate portion'42 which is1 adapted to co-afctwith thecam member .11; .The plunger head llrides withinthe' opening 43. whichreceivesgthe spring 44, which spring tends to raise modification.

of .the vertical slotsu52 which terminate in the lateral'slot49; The. lateral slot,

"grees about the peripheryof'the plunger 40 and is slightly enlarged into the opening 50 at the two vertical' slots 52 with two lateral slots'49,

with the lateral slotsarranged oppositely. The 7 'balance' of the structure beneath the plunger .41

is the same as the modification shown in Figure r 3. The. junction between the. slots;include..the cutaway portion 5| V a V V ment of the pin/l8 vertically so there will be no.

insure a positive movebi'nding or- -jamming ofthe same; r V r The spring 48 ismade'ofjsufiicient tension-"to have "a pressure range approximately between {a 1 The operation of this: modification will now be explamed:- In caseit is desired to afiix a patch to the tube it using the hot patchfthepan' 24 1s sleeve 29; The pin 48 is positioned to ride ver- 'tically in'the verticalslots 52 duringthe process, of applying. the hot patchl During the burning of =thefuel, the lever :and; the earn] 1: forces the? plunger head ll: and 74 39 is pulledfover the plunger .40 downwardly.

7 However; sincethe spring 46' will only develop a a :oertain' maximum *pressure' of not over sixty ipoun r so approximately, the efiective p r'e's-g 7 sure against the patch 'can not be over this amount the patch, and 'yet i V 49 passes practically 90 de' Figure 5' that there are and ignited afterft-he' patch 1' 1 its'proper position in. the

as described r by virtue of the pin 48 which is now moving freely within the vertical slots 52'. l a result, the'patch will be applied withoutanyl excess "in pressure. ,j patch, the plunger 41 is ninety degrees allowing the pin '48 topass through" the lateral slots 49 and into the openings 50. When the lever 39 is pulled over, the maximum pressure will pass independently 'of the spring fithrough the outer periphery of the plunger 4!), thence through the pin 68 to the plunger 41, and in this way, the total maximum pressure due to the'leveragewillbe exerted against'the patch, which, of course, in this case does not require the fuel means.

In this way acold patch can be applied readily by merely turning the plunger 41 in the manner described, which provides a simple and convenient method of achieving this result, and since the pin 48 is made suificiently large and is of a high grade of steel, it will easily absorb the maximum pressure without resulting in breakage of any of the parts.

It will be understood, of course, that the entire lower part of the device, such as the pan, the steel disc 64, the loosely engaged spider frame, and the like can be used also with this latter form, if desired, so that any interchangeable combination can be made.

apparatus for applying either hot or cold patches as described with a simple arrangement for selectively controlling either method in a unit apparatus.

It will be seen further that I have provided means for accomplishing this result to accommodate difierent forms or sizes of patches, that I have devised a machine for effectively sealing a patch either with heat or without heat with the pressures being applied under suitable pivoting arrangements to insure a maximum efficient pressure against the patch without the danger of breaking any of the parts of the machine, and that I have provided all of these means in a structure of suflicient simplicity to insure a reasonable cost of manufacture.

Some changes may be made in the construction and arrangement of the parts of my invention without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims any modified forms of structure or use of mechanical equivalents, which may be reasonably included within their scope.

I claim as my invention:

1. A tube patching apparatus comprising a plunger, a lever for forcing the plunger downwardly, a further plunger adapted to be resiliently forced against a tire patch by the first mentioned plunger, and means for locking the two plungers together independently of said resilient means to function as a continuous solid unit.

2. A tube patching apparatus comprising a plunger, a lever for forcing the plunger downwardly, said plunger having a recessed cavity, a spring within the cavity, and said plunger having vertically positioned slots, lateral slots terminating the lower limits of the vertical slots, a lower plunger including a pin attached thereto received within the said recessed cavity so that said pin is received within said slots.

3. A tube patching apparatus comprising a plunger, a lever for forcing the plunger downsaid plunger having a recessed cavity, a spring within the cavity, and said plunger having vertically positioned slots, lateral slots terminating the lower limits ofthe-vertical slots, a

lower plunger including a pm attached thereto gagement, a fuel receiving heating pan attached to the lower plunger.

5. A tube patching apparatus comprising an upper plunger, a lever for forcing said plunger downwardly,

6. A tube patching apparatus comprising an and said plunger having upper plunger, a lever for forcing said plunger downwardly, a lower spring urged plunger received within the said plunger, means for causagainst a patch, means for supplying heat to the patch, including a fuel pan attached to the plunger, said plunger including a reduced diameter extension, a. cross-arm member loosely ena cross-arm member loosely engaged therewith adapted to be forced against the edges of the fuel pan, said fuel pan including headed pins attached thereto received through openings in the said ends of the crossarms, said reduced diameter extension including an arcuate member attached at the end thereof,

9. A tube patching apparatus comprising a.

plunger, means for applying pressureagainst' the plunger, said plunger having a recessed cavity, a spring withinthe cavity,-and said plunger 7 having vertically positioned slots, lateral slots V terminating the lower limits of the vertical slots,

a lower plunger including apin attached thereto received within the said recessed cavity so that said pin is received within said slots, said lateral slots being arranged oppositely to cause engagement of the pin at the extremities thereof to cause transference of pressure to the saidlower plunger when the plunger is turned to cause such engagement, a fuel" receiving heating pan attached to the including a reduced diameter extension, a crossarm member loosely engaged therewith adapted to be forced against the edges of the fuel pan. said fuel pan including headed thereto received through openings in the said ends of the'cross-arms, said reduced diameter extension including an arcuate member, at-

tached at the end thereof, a pressure receiving disc arranged to be inserted in the pan, said disc having an arcuate cavity against which the said arcuate, member bears when a patch is being applied under great pressure. L CLARENCE E. DUNLAP.

lower plunger,. said lower plunger 7 pins attached 

